Asked by :0

PLEASE HELP ME I HAVE ABSOLUTELY NO IDEA WHAT IM DOING

Does the series converge or diverge? if it converges, what is the sum? show your work
∞
∑ -4(-1/2)^n-1
n=1
Answered by oobleck
this is just a geometric series, with
a = -4
r = -1/2
so
S = a/(1-r)
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